High-quality waterresources provide a wide range of benefits, but the value of water quality isoften not fully represented in environmental policy decisions, due in largepart to an absence of water quality valuation estimates at large, policyrelevant scales. Using nationwide property values, we estimated the benefits oflake water quality through housing markets. We find compelling evidence thathomeowners place a premium on improved water quality. This premium is largestfor lakefront property and declines with distance from the waterbody. Inaggregate, we estimated that 10% improvement of water quality for thecontiguous United States has a value of $6 to 9 billion to property owners.This presentation will share evidence for policymakers to incorporate lakewater quality value estimates in environmental decision-making.